Choose some of these examples to create a system. Explain how the flow of matter and energy occurs in the system.

What element is able to combine with itself and hydrogen to form large molecules ?

Describe how a non-resistant staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin

1. an enzyme is considered a(n) because it speeds up a chemical reaction without being used up.2. in a catalyzed reaction, a reactant is often called a(n) . an enzyme is specific because the shape of its matches only particular reactants.4. an enzyme speeds up reactions by lowering the . the between an active site and its substrate often strains bonds and the reaction proceed.6. a( , which is often a vitamin, binds to an enzyme and plays a role in catalysis.7. high temperatures or changes in ph can an enzyme, causing it to lose its shape and biological activity.